.ztree li span.button.name {margin-right:2px; background-position:-126px 0; vertical-align:top; *vertical-align:middle}
.ztree li span.button.operator {margin-right:2px; background-position:-126px -64px; vertical-align:top; *vertical-align:middle}
.ztree li span.button.param {margin-right:2px; background-position:-126px 0; vertical-align:top; *vertical-align:middle}
.ztree li span.button.add {margin-left:2px; margin-right: -1px; background-position:-144px 0; vertical-align:top; *vertical-align:middle}
.ztree li span.button.icon {margin-right:2px; background-position:-126px -80px; vertical-align:top; *vertical-align:middle}

